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/*
Copyright (C) 1996 Free Software Foundation, Inc.
Written by Michael I. Bushnell, p/BSG.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "netfs.h"
#include "fsys_S.h"
#include "misc.h"
#include <fcntl.h>
error_t
netfs_S_fsys_getroot (mach_port_t cntl,
mach_port_t dotdot,
uid_t *uids, mach_msg_type_number_t nuids,
uid_t *gids, mach_msg_type_number_t ngids,
int flags,
retry_type *do_retry,
char *retry_name,
mach_port_t *retry_port,
mach_port_t *retry_port_type)
{
struct port_info *pt = ports_lookup_port (netfs_port_bucket, cntl,
netfs_control_class);
struct netcred *cred;
error_t err;
struct protid *newpi;
mode_t type;
if (!pt)
return EOPNOTSUPP;
ports_port_deref (pt);
cred = netfs_make_credential (uids, nuids, gids, ngids);
flags &= O_HURD;
mutex_lock (&netfs_root_node->lock);
err = netfs_validate_stat (netfs_root_node, cred);
if (err)
goto out;
type = netfs_root_node->nn_stat.st_mode & S_IFMT;
if ((netfs_root_node->istranslated
|| fshelp_translated (&netfs_root_node->transbox))
&& !(flags & O_NOTRANS))
{
err = fshelp_fetch_root (&netfs_root_node->transbox,
&dotdot, dotdot, uids, nuids,
gids, ngids, flags,
_netfs_translator_callback1,
_netfs_translator_callback2,
do_retry, retry_name, retry_port);
if (err != ENOENT)
{
mutex_unlock (&netfs_root_node->lock);
if (!err)
*retry_port_type = MACH_MSG_TYPE_MOVE_SEND;
return err;
}
/* ENOENT means translator has vanished inside fshelp_fetch_root. */
err = 0;
}
if (type == S_IFLNK && !(flags & (O_NOLINK | O_NOTRANS)))
{
char pathbuf[netfs_root_node->nn_stat.st_size + 1];
err = netfs_attempt_readlink (cred, netfs_root_node, pathbuf);
mutex_unlock (&netfs_root_node->lock);
if (err)
goto out;
if (pathbuf[0] == '/')
{
*do_retry = FS_RETRY_MAGICAL;
*retry_port = MACH_PORT_NULL;
*retry_port_type = MACH_MSG_TYPE_COPY_SEND;
strcpy (retry_name, pathbuf);
mach_port_deallocate (mach_task_self (), dotdot);
return 0;
}
else
{
*do_retry = FS_RETRY_REAUTH;
*retry_port = dotdot;
*retry_port_type = MACH_MSG_TYPE_MOVE_SEND;
strcpy (retry_name, pathbuf);
return 0;
}
}
if ((type == S_IFSOCK || type == S_IFBLK || type == S_IFCHR
|| type == S_IFIFO) && (flags & (O_READ|O_WRITE|O_EXEC)))
{
mutex_unlock (&netfs_root_node->lock);
return EOPNOTSUPP;
}
err = netfs_check_open_permissions (cred, netfs_root_node, flags, 0);
if (err)
goto out;
flags &= ~OPENONLY_STATE_MODES;
newpi = netfs_make_protid (netfs_make_peropen (netfs_root_node, flags,
dotdot),
cred);
mach_port_deallocate (mach_task_self (), dotdot);
*do_retry = FS_RETRY_NORMAL;
*retry_port = ports_get_right (newpi);
*retry_port_type = MACH_MSG_TYPE_MAKE_SEND;
retry_name[0] = '\0';
ports_port_deref (newpi);
out:
mutex_unlock (&netfs_root_node->lock);
return err;
}
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